/// action_tl_hide(timeline)
/// @arg timeline

if (history_undo)
{
	with (history_data)
		for (var t = 0; t < save_var_amount; t++)
			with (save_id_find(save_var_save_id[t]))
				hide = other.save_var_old_value[t]
}
else if (history_redo)
{
	with (history_data)
		for (var t = 0; t < save_var_amount; t++)
			with (save_id_find(save_var_save_id[t]))
				hide = other.save_var_new_value[t]
}
else
{
	var hobj = history_save_var_start(action_tl_hide, false);
	action_tl_hide_tree(argument0, !argument0.hide, hobj)
}
